Engine oiling system



Jan. 2, 1934. w DAVls V 1,941,974

ENGINE OILING SYSTEM Filed April 27, 1932 2 Sheets-Sheet l amwwtm Walk r Z flaws %;Mf A W Jan. 2, 1934. w. F. DAVIS ,94

ENGINE OILING SYSTEM Filed April 27, 1932 2 Sheets-Sheet 2 INVENTOR 11/2 1676! Z'fiawls I W x ATTORNEYS Patented Jan. 2, 1934 Ubiiihh stares ENGINE OILING SYSTEM Walter F. Davis, Farmingdale, N. Y.

Application April 27, 1982. Serial No. 607,751

3 Claims.

This invention relates in general to internal combustion engines and more particularly to oiling systems and especially the arrangement of the oil sump and scavenging pumps therefor.

An object of this invention is to provide an engine in which the camshaft housing may constitute a housing for the camshaft and also a wet sump or reservoir for the engine oil.

It is another object to provide a suitable oil drainage system for the scavenging oil for delivering the oil to the wet sump and also suitable pumps for delivering the oil from the sump to the proper place to promote proper oil circulation.

The present invention is particularly concerned with inverted engines having cylinders in line and also inverted V-engines. In my copending applications on improvements in Internal combustion engines, Serial No. 582,085, filed December 19, 1931, and Engine, Serial No. 601,785, filed March 29, 1932, I have respectively shown and described inverted six cylinder in-line and twelve cylinder V-engines and oiling systems employing dry sumps and external oil reservoirs. The present invention modifies these structures to include wet sumps but utilizes the other general arrangements shown in the other two copending applications.

With the foregoing and other objects in view, the invention consists in the combination of parts and in the details of construction hereinafter set forth in the following specification and appended claims, certain embodiments thereof being illustrated in the accompanying drawings, in which:

Figure 1 is a view in side elevation, partly in section of an inverted, in-line engine employing a dry sump of the type shown in my copending application on Internal combustion engine, Serial No. 532,085, filed December 19, 1931.

Figure 2 is a similar view of my engine employing a wet sump.

Figure 3 is a view in cross-section taken through my wet sump inverted V-engine showing two banks of cylinders in end view.

Referring more particularly to the drawings, in both Figures 1 and 2 there is shown an inverted engine having a crankcase 1, at the front end of which is shown a propeller shaft. There is shown at the front and rear ends at 3 and 4 respectively conduits for delivering the scavenging oil from the bottom of the crankcase into the camshaft housing 6. The camshaft 8 having cams 9 may be lubricated in any suitable manner, such as making it hollow and forcing oil therethrough and providing it with apertures.

In the form shown in Figure 1, which represents a dry sump, there is shown a collector pipe 7 with strainer apertures 7' at either end to collect the oil whether the engine may be tipped forwardly or rearwardly. Also in this figure there 60, is shown a scavenging pump 10 and a delivery pipe 5 for carrying the scavenging oil to an external storage tank, which latter is not illustrated.

In my preferred form as shown in Figure 2, in which I employ a wet sump, I form the sump 6 so as to increase its depth at 6 so as to constitute an oil reservoir instead of employing an exterior oil storage tank. In this form I may employ a similar scavenging pump 10 to which I may attach a strainer 12 and pump the oil upward through the pipe 5 directly to the working parts of the engine in the crankcase, which as shown in my copending application, Serial No. 582,085, would be to the accessory drive shaft which is hollow and forms the uppermost oil sup- 76 ply conduit.

I may duplicate the arrangement shown in Figure 2 in providing for an inverted V-engine in that'while employing but one crankcase, I may provide a sump of the type shown in Figure 2 for each bank of cylinders.

On the other hand, in making provision for an inverted V-engine, I may provide an arrangement such as shown in Figure 3, the essential difference being that I may drain the scavenging oil from the two sumps into a common communicating reservoir from which this oil may be pumped back into the crankcase. In this form,

but one crankcase 13 is employed and the two banks of cylinders are indicated at 21 and 22. The crankcase is shown with its bottom dropped at 14 from whence the scavenging oil travels through pipes 15 and 16 into the camshaft housings 17 and 18 respectively. The oil reservoir 19 may be secured to the camshaft housings 1'7 and 18 so as to bridge the distance therebetween and is formed with apertures 19' at either side to conform with apertures 17' and 18 in the camshaft housings 17 and 18 respectively, so that the reservoir will collect the scavenging oil from the 1 two camshaft housings. The reservoir, besides being located in a position which would allow for a cooling of the oil, may also be provided with fins 20 to facilitate such cooling.

I claim:

1. In an internal combustion engine having a plurality of banks of cylinders, a single crankcase, and a plurality of camshaft housings therebeneath, each of said housings, being adapted to receive the scavenging oil of said engine and in 11 Eis- 3. In an internal combustion engine having a plurality of banks of cylinders, a single crankcase, and a plurality of camshaft housings therebeneath, each of said housings being adapted to receive the scavenging oil of said engine and in conjunction with a receptacle connecting said housings to constitute a reservoir for such oil, and means located therein for pumping the oil therefrom.

WALTER F. DAVIS. 

